William E Mcnulty DeceasedPlacida, FL

6998832, Feb 14, 2006

Feb 26, 2004

10/787793

William J. McNulty - River Forest IL, US

HD Electric Company - Waukegan IL

G01R 31/02
G01R 29/12

324 725, 324457

A digital voltage indicator includes a probe having a first electrode including a hollow portion and a probe tip projecting from the hollow portion, a second electrode extending into the hollow portion and spaced therefrom, and dielectric material disposed between the second electrode and the hollow portion. The indicator may include a reference conductor connected to the second electrode and detection circuitry connected between the probe and the reference conductor for detecting a voltage difference therebetween, and an annunciator connected to the detection circuitry for displaying the measured voltage.

7746051, Jun 29, 2010

Feb 18, 2009

12/372775

James S. Buchanan - Northbrook IL, US
William J. McNulty - Washington DC, US

HD Electric Company - Waukegan IL

G01R 31/02
G01R 19/00

324 725, 324114, 324141, 324149, 324754, 3241581, 702 62

A voltmeter/phaser includes dual hot-stick probes, each carrying a housing including a digital display, one of the housings also having a measurement circuit for measuring the sensed voltage. A plural-conductor cable interconnects the housings and carries, in two separate conductors, current between the probes and display data between the display circuits, so that identical voltage values are always displayed on the two displays.

6329924, Dec 11, 2001

Mar 17, 2000

9/528166

William J. McNulty - River Forest IL

HD Electric Company - Waukegan IL

G08B 2100

340660

A wearable electric field detector has a housing mountable on a user's person and including a sensing circuit responsive to an electric field to generate a signal which varies in proportion to the strength of the sensed field, and an alarm circuit coupled to the sensing circuit for producing an intermittent audible alarm signal, which has a repetition rate varying in proportion to the strength of the field, and a visible alarm signal. A mute circuit is manually activatable for selectively muting the audible alarm and then automatically reenabling it after a predetermined time period. The detector includes a manually-actuatable test circuit. There is no on-off switch, the detector being disabled by being disposed in a shielded carrying case.

6130530, Oct 10, 2000

Dec 22, 1997

8/996161

William J. McNulty - River Forest IL

HD Electric Company - Waukegan IL

G01R 3102

324 731

A tester for power transformers and capacitors includes a pulse generator for applying a pulsating test signal to a pair of test leads which may be connected across the terminals of the device to be tested. Also connected across the test leads are a capacitor detector, an inductor detector and a continuity detector. If the connections to the transformer or capacitor in the device to be tested are good, the capacitor detector and inductor detector will distinguish one from the other and indicate that its condition is good. If the connections to the device are not good, the continuity detector will indicate whether there is a short circuit or open circuit condition. The detectors are coupled through control logic circuitry to an indicator circuit including a horn and blinking lights for providing unique indications of capacitor okay, inductor okay, short and open conditions. The capacitor detector provides a discharge path for a capacitor and detects the discharge current flow. The inductor detector responds to the kickback voltage of an inductor, which is of a polarity opposite to that of the input test pulse.

6124714, Sep 26, 2000

Mar 9, 1998

9/036772

William J. McNulty - River Forest IL
Mark R. Hoffman - Lake Forest IL

HD Electric Company - Waukegan IL

G01R 3102

324418

A lightning arrester tester includes two tubular poles respectively carrying probe terminals, one probe terminal being connected in series through a high-voltage rectifier and high-resistance circuit disposed within the pole to one terminal of a DC microammeter mounted on the outside of the one pole, the other probe terminal being connected through a high-resistance circuit housed within the second pole to the other meter terminal. A diode is connected in parallel with the meter to protect the meter from high leakage currents. In use, the probe terminals are respectively connected to a high-voltage power transmission or distribution line and one terminal of an arrester, the other terminal of which is grounded or, alternatively, to ground and to one terminal of an arrester, the other terminal of which is connected to a high-voltage power transmission or distribution line. The meter displays DC leakage current through the arrester.

6323638, Nov 27, 2001

Apr 1, 1999

9/283862

William J. McNulty - River Forest IL

HD Electric Company - Waukegan IL

G01R 3102

324149

A device for testing a conductor for the presence of high AC voltage includes a voltage detection circuit connected to a probe assembly, preferably designed for insertion in the access bushing of an underground electrical transmission or distribution equipment. The probe assembly includes an elongated tubular insulating housing with a conductive probe at one end and a threaded connector at the other end for connection to the detection circuit. A high resistance, preferably several megohms, is connected in series between the tip and the connector and is preferably comprised of a plurality of series-connected resistors encased in a heat shrink tubing.

2016004, Feb 11, 2016

Aug 6, 2014

14/452744

- Waukegan IL, US
James S. Buchanan - Northbrook IL, US
William John McNulty - Washington DC, US

G01R 19/25
G01R 25/00

A high voltage digital voltmeter and wireless phaser includes first and second voltmeters/phasers. Each voltmeter/phaser has a probe for accessing a point in a circuit, circuitry connected to the probe and including a microprocessor, and a ground reference associated with the circuitry. Each microprocessor is programmed to measure line-to-ground voltage of the respective voltmeter/phaser. This information is shared between the microprocessors and is used to determine voltage measurements and phase angle difference.